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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-mgm.html">ndb_mgm — The NDB Cluster Management Client</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-blob-tool.html">ndb_blob_tool — Check and Repair BLOB and TEXT columns of NDB Cluster
        Tables</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-config.html">ndb_config — Extract NDB Cluster Configuration Information</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-delete-all.html">ndb_delete_all — Delete All Rows from an NDB Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-index-stat.html">ndb_index_stat — NDB Index Statistics Utility</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-move-data.html">ndb_move_data — NDB Data Copy Utility</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-perror.html">ndb_perror — Obtain NDB Error Message Information</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-print-file.html">ndb_print_file — Print NDB Disk Data File Contents</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-redo-log-reader.html">ndb_redo_log_reader — Check and Print Content of Cluster Redo Log</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><a class="expandable  loaded" aria-label="Subnav" href=""><span class="icon-chevron-right"></span></a></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-restore.html">ndb_restore — Restore an NDB Cluster Backup</a></div></div>                        <div class="docs-submenu hidden">
                                    
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-select-all.html">ndb_select_all — Print Rows from an NDB Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-select-count.html">ndb_select_count — Print Row Counts for NDB Tables</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-setup-py.html">ndb_setup.py — Start browser-based Auto-Installer for
        NDB Cluster</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-show-tables.html">ndb_show_tables — Display List of NDB Tables</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-size-pl.html">ndb_size.pl — NDBCLUSTER Size Requirement Estimator</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-top.html">ndb_top — View CPU usage information for NDB threads</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-programs-ndb-waiter.html">ndb_waiter — Wait for NDB Cluster to Reach a Given Status</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-program-options-common.html">Options Common to NDB Cluster Programs — Options Common to NDB Cluster Programs</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-log-statistics.html">Using CLUSTERLOG STATISTICS in the NDB Cluster Management Client</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-logs-event-buffer.html">Event Buffer Reporting in the Cluster Log</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndb-transporter-errors.html">NDB Cluster: NDB Transporter Errors</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-single-user-mode.html">NDB Cluster Single User Mode</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-sql-statements.html">Quick Reference: NDB Cluster SQL Statements</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><a class="expandable  loaded" aria-label="Subnav" href=""><span class="icon-chevron-right"></span></a></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo.html">ndbinfo: The NDB Cluster Information Database</a></div></div>                        <div class="docs-submenu hidden">
                                    
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-arbitrator-validity-detail.html">The ndbinfo arbitrator_validity_detail Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-disk-write-speed-aggregate.html">The ndbinfo disk_write_speed_aggregate Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-disk-write-speed-aggregate-node.html">The ndbinfo disk_write_speed_aggregate_node Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-logbuffers.html">The ndbinfo logbuffers Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-memoryusage.html">The ndbinfo memoryusage Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-nodes.html">The ndbinfo nodes Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-operations-per-fragment.html">The ndbinfo operations_per_fragment Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-server-operations.html">The ndbinfo server_operations Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-server-transactions.html">The ndbinfo server_transactions Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-table-distribution-status.html">The ndbinfo table_distribution_status Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-table-fragments.html">The ndbinfo table_fragments Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-table-info.html">The ndbinfo table_info Table</a></div></div>                    </li>
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            <div><div class="docs-sidebar-nav-icon"><span class="icon-dot"></span></div><div class="docs-sidebar-nav-link"><a href="mysql-cluster-ndbinfo-table-replicas.html">The ndbinfo table_replicas Table</a></div></div>                    </li>
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                                                                                MySQL NDB Cluster 8.0
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<h1 class="title"><a name="mysql-cluster"></a>Chapter 22 MySQL NDB Cluster 8.0</h1>

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<div class="toc">
<p><b>Table of Contents</b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<small>[<a href="#" class="tocdetail" onclick="toggle('tocdetail-1'); toggle('tocdetail-2'); toggle('tocdetail-3'); toggle('tocdetail-4'); toggle('tocdetail-5'); toggle('tocdetail-6'); return false;" onkeypress="if (event.keyCode == 13) { toggle('tocdetail-1'); toggle('tocdetail-2'); toggle('tocdetail-3'); toggle('tocdetail-4'); toggle('tocdetail-5'); toggle('tocdetail-6'); return false; } ">+/-</a>]</small></p><dl id="tocdetail"><dt><span class="section"><a href="mysql-cluster-overview.html">22.1 NDB Cluster Overview</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<small>[<a href="#" class="tocdetail" onclick="toggle('tocdetail-1'); return false;" onkeypress="if (event.keyCode == 13) { toggle('tocdetail-1'); return false;}">+/-</a>]</small></dt>
<dd style="display:none;" id="tocdetail-1"><dl><dt><span class="section"><a href="mysql-cluster-basics.html">22.1.1 NDB Cluster Core Concepts</a></span></dt><dt><span class="section"><a href="mysql-cluster-nodes-groups.html">22.1.2 NDB Cluster Nodes, Node Groups, Replicas, and Partitions</a></span></dt><dt><span class="section"><a href="mysql-cluster-overview-requirements.html">22.1.3 NDB Cluster Hardware, Software, and Networking Requirements</a></span></dt><dt><span class="section"><a href="mysql-cluster-what-is-new.html">22.1.4 What is New in NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-added-deprecated-removed.html">22.1.5 Options, Variables, and Parameters Added, Deprecated or Removed in NDB
      8.0</a></span></dt><dt><span class="section"><a href="mysql-cluster-compared.html">22.1.6 MySQL Server Using InnoDB Compared with NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-limitations.html">22.1.7 Known Limitations of NDB Cluster</a></span></dt></dl></dd><dt><span class="section"><a href="mysql-cluster-installation.html">22.2 NDB Cluster Installation</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<small>[<a href="#" class="tocdetail" onclick="toggle('tocdetail-2'); return false;" onkeypress="if (event.keyCode == 13) { toggle('tocdetail-2'); return false;}">+/-</a>]</small></dt>
<dd style="display:none;" id="tocdetail-2"><dl><dt><span class="section"><a href="mysql-cluster-installer.html">22.2.1 The NDB Cluster Auto-Installer</a></span></dt><dt><span class="section"><a href="mysql-cluster-install-linux.html">22.2.2 Installation of NDB Cluster on Linux</a></span></dt><dt><span class="section"><a href="mysql-cluster-install-windows.html">22.2.3 Installing NDB Cluster on Windows</a></span></dt><dt><span class="section"><a href="mysql-cluster-install-configuration.html">22.2.4 Initial Configuration of NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-install-first-start.html">22.2.5 Initial Startup of NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-install-example-data.html">22.2.6 NDB Cluster Example with Tables and Data</a></span></dt><dt><span class="section"><a href="mysql-cluster-install-shutdown-restart.html">22.2.7 Safe Shutdown and Restart of NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-upgrade-downgrade.html">22.2.8 Upgrading and Downgrading NDB Cluster</a></span></dt></dl></dd><dt><span class="section"><a href="mysql-cluster-configuration.html">22.3 Configuration of NDB Cluster</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<small>[<a href="#" class="tocdetail" onclick="toggle('tocdetail-3'); return false;" onkeypress="if (event.keyCode == 13) { toggle('tocdetail-3'); return false;}">+/-</a>]</small></dt>
<dd style="display:none;" id="tocdetail-3"><dl><dt><span class="section"><a href="mysql-cluster-quick.html">22.3.1 Quick Test Setup of NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-configuration-overview.html">22.3.2 Overview of NDB Cluster Configuration Parameters, Options, and Variables</a></span></dt><dt><span class="section"><a href="mysql-cluster-config-file.html">22.3.3 NDB Cluster Configuration Files</a></span></dt><dt><span class="section"><a href="mysql-cluster-interconnects.html">22.3.4 Using High-Speed Interconnects with NDB Cluster</a></span></dt></dl></dd><dt><span class="section"><a href="mysql-cluster-programs.html">22.4 NDB Cluster Programs</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<small>[<a href="#" class="tocdetail" onclick="toggle('tocdetail-4'); return false;" onkeypress="if (event.keyCode == 13) { toggle('tocdetail-4'); return false;}">+/-</a>]</small></dt>
<dd style="display:none;" id="tocdetail-4"><dl><dt><span class="section"><a href="mysql-cluster-programs-ndbd.html">22.4.1 <span class="command"><strong>ndbd</strong></span> — The NDB Cluster Data Node Daemon</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndbinfo-select-all.html">22.4.2 <span class="command"><strong>ndbinfo_select_all</strong></span> — Select From ndbinfo Tables</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndbmtd.html">22.4.3 <span class="command"><strong>ndbmtd</strong></span> — The NDB Cluster Data Node Daemon (Multi-Threaded)</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-mgmd.html">22.4.4 <span class="command"><strong>ndb_mgmd</strong></span> — The NDB Cluster Management Server Daemon</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-mgm.html">22.4.5 <span class="command"><strong>ndb_mgm</strong></span> — The NDB Cluster Management Client</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-blob-tool.html">22.4.6 <span class="command"><strong>ndb_blob_tool</strong></span> — Check and Repair BLOB and TEXT columns of NDB Cluster
        Tables</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-config.html">22.4.7 <span class="command"><strong>ndb_config</strong></span> — Extract NDB Cluster Configuration Information</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-delete-all.html">22.4.8 <span class="command"><strong>ndb_delete_all</strong></span> — Delete All Rows from an NDB Table</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-desc.html">22.4.9 <span class="command"><strong>ndb_desc</strong></span> — Describe NDB Tables</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-drop-index.html">22.4.10 <span class="command"><strong>ndb_drop_index</strong></span> — Drop Index from an NDB Table</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-drop-table.html">22.4.11 <span class="command"><strong>ndb_drop_table</strong></span> — Drop an NDB Table</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-error-reporter.html">22.4.12 <span class="command"><strong>ndb_error_reporter</strong></span> — NDB Error-Reporting Utility</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-import.html">22.4.13 <span class="command"><strong>ndb_import</strong></span> — Import CSV Data Into NDB</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-index-stat.html">22.4.14 <span class="command"><strong>ndb_index_stat</strong></span> — NDB Index Statistics Utility</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-move-data.html">22.4.15 <span class="command"><strong>ndb_move_data</strong></span> — NDB Data Copy Utility</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-perror.html">22.4.16 <span class="command"><strong>ndb_perror</strong></span> — Obtain NDB Error Message Information</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-print-backup-file.html">22.4.17 <span class="command"><strong>ndb_print_backup_file</strong></span> — Print NDB Backup File Contents</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-print-file.html">22.4.18 <span class="command"><strong>ndb_print_file</strong></span> — Print NDB Disk Data File Contents</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-print-frag-file.html">22.4.19 <span class="command"><strong>ndb_print_frag_file</strong></span> — Print NDB Fragment List File Contents</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-print-schema-file.html">22.4.20 <span class="command"><strong>ndb_print_schema_file</strong></span> — Print NDB Schema File Contents</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-print-sys-file.html">22.4.21 <span class="command"><strong>ndb_print_sys_file</strong></span> — Print NDB System File Contents</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-redo-log-reader.html">22.4.22 <span class="command"><strong>ndb_redo_log_reader</strong></span> — Check and Print Content of Cluster Redo Log</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-restore.html">22.4.23 <span class="command"><strong>ndb_restore</strong></span> — Restore an NDB Cluster Backup</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-select-all.html">22.4.24 <span class="command"><strong>ndb_select_all</strong></span> — Print Rows from an NDB Table</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-select-count.html">22.4.25 <span class="command"><strong>ndb_select_count</strong></span> — Print Row Counts for NDB Tables</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-setup-py.html">22.4.26 <span class="command"><strong>ndb_setup.py</strong></span> — Start browser-based Auto-Installer for
NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-show-tables.html">22.4.27 <span class="command"><strong>ndb_show_tables</strong></span> — Display List of NDB Tables</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-size-pl.html">22.4.28 <span class="command"><strong>ndb_size.pl</strong></span> — NDBCLUSTER Size Requirement Estimator</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-top.html">22.4.29 <span class="command"><strong>ndb_top</strong></span> — View CPU usage information for NDB threads</a></span></dt><dt><span class="section"><a href="mysql-cluster-programs-ndb-waiter.html">22.4.30 <span class="command"><strong>ndb_waiter</strong></span> — Wait for NDB Cluster to Reach a Given Status</a></span></dt><dt><span class="section"><a href="mysql-cluster-program-options-common.html">22.4.31 Options Common to NDB Cluster Programs — Options Common to NDB Cluster Programs</a></span></dt></dl></dd><dt><span class="section"><a href="mysql-cluster-management.html">22.5 Management of NDB Cluster</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<small>[<a href="#" class="tocdetail" onclick="toggle('tocdetail-5'); return false;" onkeypress="if (event.keyCode == 13) { toggle('tocdetail-5'); return false;}">+/-</a>]</small></dt>
<dd style="display:none;" id="tocdetail-5"><dl><dt><span class="section"><a href="mysql-cluster-start-phases.html">22.5.1 Summary of NDB Cluster Start Phases</a></span></dt><dt><span class="section"><a href="mysql-cluster-mgm-client-commands.html">22.5.2 Commands in the NDB Cluster Management Client</a></span></dt><dt><span class="section"><a href="mysql-cluster-backup.html">22.5.3 Online Backup of NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-mysqld.html">22.5.4 MySQL Server Usage for NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-rolling-restart.html">22.5.5 Performing a Rolling Restart of an NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-event-reports.html">22.5.6 Event Reports Generated in NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-logs-ndb-messages.html">22.5.7 NDB Cluster Log Messages</a></span></dt><dt><span class="section"><a href="mysql-cluster-single-user-mode.html">22.5.8 NDB Cluster Single User Mode</a></span></dt><dt><span class="section"><a href="mysql-cluster-sql-statements.html">22.5.9 Quick Reference: NDB Cluster SQL Statements</a></span></dt><dt><span class="section"><a href="mysql-cluster-ndbinfo.html">22.5.10 ndbinfo: The NDB Cluster Information Database</a></span></dt><dt><span class="section"><a href="mysql-cluster-i_s-tables.html">22.5.11 INFORMATION_SCHEMA Tables for NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-security.html">22.5.12 NDB Cluster Security Issues</a></span></dt><dt><span class="section"><a href="mysql-cluster-disk-data.html">22.5.13 NDB Cluster Disk Data Tables</a></span></dt><dt><span class="section"><a href="mysql-cluster-online-operations.html">22.5.14 Online Operations with ALTER TABLE in NDB Cluster</a></span></dt><dt><span class="section"><a href="mysql-cluster-online-add-node.html">22.5.15 Adding NDB Cluster Data Nodes Online</a></span></dt><dt><span class="section"><a href="mysql-cluster-privilege-distribution.html">22.5.16 Distributed MySQL Privileges (Not Supported)</a></span></dt><dt><span class="section"><a href="mysql-cluster-ndb-api-statistics.html">22.5.17 NDB API Statistics Counters and Variables</a></span></dt></dl></dd><dt><span class="section"><a href="mysql-cluster-replication.html">22.6 NDB Cluster Replication</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<small>[<a href="#" class="tocdetail" onclick="toggle('tocdetail-6'); return false;" onkeypress="if (event.keyCode == 13) { toggle('tocdetail-6'); return false;}">+/-</a>]</small></dt>
<dd style="display:none;" id="tocdetail-6"><dl><dt><span class="section"><a href="mysql-cluster-replication-abbreviations.html">22.6.1 NDB Cluster Replication: Abbreviations and Symbols</a></span></dt><dt><span class="section"><a href="mysql-cluster-replication-general.html">22.6.2 General Requirements for NDB Cluster Replication</a></span></dt><dt><span class="section"><a href="mysql-cluster-replication-issues.html">22.6.3 Known Issues in NDB Cluster Replication</a></span></dt><dt><span class="section"><a href="mysql-cluster-replication-schema.html">22.6.4 NDB Cluster Replication Schema and Tables</a></span></dt><dt><span class="section"><a href="mysql-cluster-replication-preparation.html">22.6.5 Preparing the NDB Cluster for Replication</a></span></dt><dt><span class="section"><a href="mysql-cluster-replication-starting.html">22.6.6 Starting NDB Cluster Replication (Single Replication Channel)</a></span></dt><dt><span class="section"><a href="mysql-cluster-replication-two-channels.html">22.6.7 Using Two Replication Channels for NDB Cluster Replication</a></span></dt><dt><span class="section"><a href="mysql-cluster-replication-failover.html">22.6.8 Implementing Failover with NDB Cluster Replication</a></span></dt><dt><span class="section"><a href="mysql-cluster-replication-backups.html">22.6.9 NDB Cluster Backups With NDB Cluster Replication</a></span></dt><dt><span class="section"><a href="mysql-cluster-replication-multi-master.html">22.6.10 NDB Cluster Replication: Multi-Master and Circular Replication</a></span></dt><dt><span class="section"><a href="mysql-cluster-replication-conflict-resolution.html">22.6.11 NDB Cluster Replication Conflict Resolution</a></span></dt></dl></dd><dt><span class="section"><a href="mysql-cluster-news.html">22.7 NDB Cluster Release Notes</a></span></dt></dl>
</div>
<a class="indexterm" name="idm139663115378336"></a><a class="indexterm" name="idm139663115377264"></a><a class="indexterm" name="idm139663115375776"></a><a class="indexterm" name="idm139663115374272"></a><p>
    MySQL <span class="firstterm">NDB Cluster</span> is a
    high-availability, high-redundancy version of MySQL adapted for the
    distributed computing environment. Recent NDB Cluster release series
    use version 8 of the <a class="link" href="mysql-cluster.html" title="Chapter 22 MySQL NDB Cluster 8.0"><code class="literal">NDB</code></a> storage engine
    (also known as <a class="link" href="mysql-cluster.html" title="Chapter 22 MySQL NDB Cluster 8.0"><code class="literal">NDBCLUSTER</code></a>) to enable
    running several computers with MySQL servers and other software in a
    cluster. NDB Cluster 8.0, now available as a Developer Milestone
    Release (DMR) beginning with version 8.0.13, incorporates version
    8.0 of the <code class="literal">NDB</code> storage engine. NDB Cluster 7.6,
    is the current GA release, and uses version 7.6 of
    <code class="literal">NDB</code>. Previous GA releases still available for use
    in production, NDB Cluster 7.5 and NDB Cluster 7.4, incorporate
    <code class="literal">NDB</code> versions 7.5 and 7.4, respectively. NDB
    Cluster 7.2, which uses version 7.2 of the <code class="literal">NDB</code>
    storage engine, is a previous GA release that is currently still
    maintained; 7.2 users are encouraged to upgrade to NDB 7.5 or NDB
    7.6. <span class="emphasis"><em>NDB 7.1 and previous release series are no longer
    supported or maintained</em></span>.
  </p><p>
    Support for the <a class="link" href="mysql-cluster.html" title="Chapter 22 MySQL NDB Cluster 8.0"><code class="literal">NDB</code></a> storage engine is
    not included in standard MySQL Server 8.0 binaries built by Oracle.
    Instead, users of NDB Cluster binaries from Oracle should upgrade to
    the most recent binary release of NDB Cluster for supported
    platforms—these include RPMs that should work with most Linux
    distributions. NDB Cluster 8.0 users who build from source should
    use the sources provided for MySQL 8.0 and build with the options
    required to provide NDB support. (Locations where the sources can be
    obtained are listed later in this section.)
</p>
<div class="important" style="margin-left: 0.5in; margin-right: 0.5in;">

<div class="admon-title">
Important
</div>
<p>
      MySQL NDB Cluster does not support InnoDB cluster, which must be
      deployed using MySQL Server 8.0 with the
      <a class="link" href="innodb-storage-engine.html" title="Chapter 15 The InnoDB Storage Engine"><code class="literal">InnoDB</code></a> storage engine as well as
      additional applications that are not included in the NDB Cluster
      distribution. MySQL Server 8.0 binaries cannot be used with MySQL
      NDB Cluster. For more information about deploying and using
      InnoDB cluster, see
      <a class="xref" href="mysql-innodb-cluster-userguide.html" title="Chapter 21 InnoDB Cluster">Chapter 21, <i>InnoDB Cluster</i></a>.
      <a class="xref" href="mysql-cluster-compared.html" title="22.1.6 MySQL Server Using InnoDB Compared with NDB Cluster">Section 22.1.6, “MySQL Server Using InnoDB Compared with NDB Cluster”</a>, discusses differences
      between the <code class="literal">NDB</code> and <code class="literal">InnoDB</code>
      storage engines.
</p>
</div>
<p>
    This chapter contains information about NDB Cluster 8.0 releases
    through 8.0.18-ndb-8.0.18, currently available as a
    Developer Preview. NDB Cluster 7.6 is the latest General
    Availability release, and is recommended for new deployments; for
    information about NDB Cluster 7.6, see
    <a class="ulink" href="https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-what-is-new-7-6.html" target="_top">What is New in NDB Cluster 7.6</a>. For
    similar information about NDB Cluster 7.5, see
    <a class="ulink" href="https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-what-is-new-7-5.html" target="_top">What is New in NDB Cluster 7.5</a>. NDB
    Cluster 7.4 and 7.3 are previous GA releases still supported in
    production; see <a class="ulink" href="https://dev.mysql.com/doc/refman/5.6/en/mysql-cluster.html" target="_top">MySQL NDB Cluster 7.3 and NDB Cluster 7.4</a>. NDB
    Cluster 7.2 is a previous GA release series which is still
    maintained, although we recommend that new deployments for
    production use NDB Cluster 7.6. For more information about NDB
    Cluster 7.2, see <a class="ulink" href="https://dev.mysql.com/doc/refman/5.5/en/mysql-cluster.html" target="_top">MySQL NDB Cluster 7.2</a>.
  </p><a class="indexterm" name="idm139663115353040"></a><p><b>Supported Platforms. </b>
      NDB Cluster is currently available and supported on a number of
      platforms. For exact levels of support available for on specific
      combinations of operating system versions, operating system
      distributions, and hardware platforms, please refer to
      <a class="ulink" href="https://www.mysql.com/support/supportedplatforms/cluster.html" target="_top">https://www.mysql.com/support/supportedplatforms/cluster.html</a>.
    </p><p><b>Availability. </b>
      NDB Cluster binary and source packages are available for supported
      platforms from <a class="ulink" href="https://dev.mysql.com/downloads/cluster/" target="_top">https://dev.mysql.com/downloads/cluster/</a>.
    </p><p><b>NDB Cluster release numbers. </b>
      NDB 8.0 follows the same release pattern as the MySQL Server 8.0
      series of releases, beginning with MySQL 8.0.13 and MySQL NDB
      Cluster 8.0.13. In this <em class="citetitle">Manual</em> and other
      MySQL documentation, we identify these and later NDB Cluster
      releases employing a version number that begins with
      <span class="quote">“<span class="quote">NDB</span>”</span>. This version number is that of the
      <a class="link" href="mysql-cluster.html" title="Chapter 22 MySQL NDB Cluster 8.0"><code class="literal">NDBCLUSTER</code></a> storage engine used in the
      NDB 8.0 release, and is the same as the MySQL 8.0 server version
      on which the NDB Cluster 8.0 release is based.
    </p><p><a name="mysql-cluster-version-strings"></a><b>Version strings used in NDB Cluster software. </b>
      The version string displayed by the <a class="link" href="mysql.html" title="4.5.1 mysql — The MySQL Command-Line Client"><span class="command"><strong>mysql</strong></span></a>
      client supplied with the MySQL NDB Cluster distribution uses this
      format:
    </p><pre class="programlisting copytoclipboard line-numbers language-simple one-line"><code class="language-simple">mysql-<em class="replaceable">mysql_server_version</em>-cluster</code></pre><p>
    <em class="replaceable"><code>mysql_server_version</code></em> represents the
    version of the MySQL Server on which the NDB Cluster release is
    based. For all NDB Cluster 8.0 releases, this is
    <code class="literal">8.0.<em class="replaceable"><code>n</code></em></code>, where
    <em class="replaceable"><code>n</code></em> is the release number. Building from
    source using <a class="link" href="source-configuration-options.html#option_cmake_with_ndbcluster"><code class="option">-DWITH_NDBCLUSTER</code></a> or the
    equivalent adds the <code class="literal">-cluster</code> suffix to the
    version string. (See
    <a class="xref" href="mysql-cluster-install-linux-source.html" title="22.2.2.4 Building NDB Cluster from Source on Linux">Section 22.2.2.4, “Building NDB Cluster from Source on Linux”</a>, and
    <a class="xref" href="mysql-cluster-install-windows-source.html" title="22.2.3.2 Compiling and Installing NDB Cluster from Source on Windows">Section 22.2.3.2, “Compiling and Installing NDB Cluster from Source on Windows”</a>.) You can see
    this format used in the <a class="link" href="mysql.html" title="4.5.1 mysql — The MySQL Command-Line Client"><span class="command"><strong>mysql</strong></span></a> client, as shown
    here:
  </p><pre class="programlisting copytoclipboard line-numbers language-terminal"><code class="language-terminal">shell&gt; mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 8.0.18-cluster Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql&gt; SELECT VERSION()\G
*************************** 1. row ***************************
VERSION(): 8.0.18-cluster
1 row in set (0.00 sec)</code></pre><p>
    The first release of NDB Cluster using MySQL 8.0 was NDB 8.0.13,
    which used MySQL 8.0.13.
  </p><p>
    The version string displayed by other NDB Cluster programs not
    normally included with the MySQL 8.0 distribution uses this format:
  </p><pre class="programlisting copytoclipboard line-numbers language-simple one-line"><code class="language-simple">mysql-<em class="replaceable">mysql_server_version</em> ndb-<em class="replaceable">ndb_engine_version</em></code></pre><p>
    <em class="replaceable"><code>mysql_server_version</code></em> represents the
    version of the MySQL Server on which the NDB Cluster release is
    based. For all NDB Cluster 8.0 releases, this is
    <code class="literal">8.0.<em class="replaceable"><code>n</code></em></code>, where
    <em class="replaceable"><code>n</code></em> is the release number.
    <em class="replaceable"><code>ndb_engine_version</code></em> is the version of the
    <a class="link" href="mysql-cluster.html" title="Chapter 22 MySQL NDB Cluster 8.0"><code class="literal">NDB</code></a> storage engine used by this release
    of the NDB Cluster software. For all NDB 8.0 releases, this number
    is the same as the MySQL Server version. You can see this format
    used in the output of the <code class="literal">SHOW</code> command in the
    <a class="link" href="mysql-cluster-programs-ndb-mgm.html" title="22.4.5 ndb_mgm — The NDB Cluster Management Client"><span class="command"><strong>ndb_mgm</strong></span></a> client, like this:
  </p><pre class="programlisting copytoclipboard line-numbers language-ndbmgm"><code class="language-ndbmgm">ndb_mgm&gt; SHOW
Connected to Management Server at: localhost:1186
Cluster Configuration
---------------------
[ndbd(NDB)]     2 node(s)
id=1    @10.0.10.6  (mysql-8.0.18 ndb-8.0.18-ndb-8.0.18, Nodegroup: 0, *)
id=2    @10.0.10.8  (mysql-8.0.18 ndb-8.0.18-ndb-8.0.18, Nodegroup: 0)

[ndb_mgmd(MGM)] 1 node(s)
id=3    @10.0.10.2  (mysql-8.0.18 ndb-8.0.18-ndb-8.0.18)

[mysqld(API)]   2 node(s)
id=4    @10.0.10.10  (mysql-8.0.18 ndb-8.0.18-ndb-8.0.18)
id=5 (not connected, accepting connect from any host)</code></pre><p><b>Compatibility with standard MySQL 8.0 releases. </b>
      While many standard MySQL schemas and applications can work using
      NDB Cluster, it is also true that unmodified applications and
      database schemas may be slightly incompatible or have suboptimal
      performance when run using NDB Cluster (see
      <a class="xref" href="mysql-cluster-limitations.html" title="22.1.7 Known Limitations of NDB Cluster">Section 22.1.7, “Known Limitations of NDB Cluster”</a>). Most of these issues
      can be overcome, but this also means that you are very unlikely to
      be able to switch an existing application datastore—that
      currently uses, for example, <a class="link" href="myisam-storage-engine.html" title="16.2 The MyISAM Storage Engine"><code class="literal">MyISAM</code></a>
      or <a class="link" href="innodb-storage-engine.html" title="Chapter 15 The InnoDB Storage Engine"><code class="literal">InnoDB</code></a>—to use the
      <a class="link" href="mysql-cluster.html" title="Chapter 22 MySQL NDB Cluster 8.0"><code class="literal">NDB</code></a> storage engine without allowing
      for the possibility of changes in schemas, queries, and
      applications. A <a class="link" href="mysqld.html" title="4.3.1 mysqld — The MySQL Server"><span class="command"><strong>mysqld</strong></span></a> compiled without
      <code class="literal">NDB</code> support (that is, built without
      <a class="link" href="source-configuration-options.html#option_cmake_with_ndbcluster_storage_engine"><code class="option">-DWITH_NDBCLUSTER_STORAGE_ENGINE</code></a> or
      its alias <code class="option">-DWITH_NDBCLUSTER</code>) cannot function as a
      drop-in replacement for a <a class="link" href="mysqld.html" title="4.3.1 mysqld — The MySQL Server"><span class="command"><strong>mysqld</strong></span></a> that is built
      with it.
    </p><p><b>NDB Cluster development source trees. </b>
      NDB Cluster development trees can also be accessed from
      <a class="ulink" href="https://github.com/mysql/mysql-server" target="_top">https://github.com/mysql/mysql-server</a>.
    </p><p>
    The NDB Cluster development sources maintained at
    <a class="ulink" href="https://github.com/mysql/mysql-server" target="_top">https://github.com/mysql/mysql-server</a> are licensed
    under the GPL. For information about obtaining MySQL sources using
    Git and building them yourself, see
    <a class="xref" href="installing-development-tree.html" title="2.9.3 Installing MySQL Using a Development Source Tree">Section 2.9.3, “Installing MySQL Using a Development Source Tree”</a>.
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">

<div class="admon-title">
Note
</div>
<p>
      As with MySQL Server 8.0, NDB Cluster 8.0 releases are built using
      <span class="command"><strong>CMake</strong></span>.
</p>
</div>
<p>
    NDB Cluster 7.5 and NDB Cluster 7.6 are available as General
    Availability (GA) releases; NDB 7.6 is recommended for new
    deployments. NDB Cluster 7.4 and NDB Cluster 7.3 are previous GA
    releases which are still supported in production. NDB 7.2 is a
    previous GA release series which is still maintained; it is no
    longer recommended for new deployments. For an overview of major
    features added in NDB 7.6, see
    <a class="ulink" href="https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-what-is-new-7-6.html" target="_top">What is New in NDB Cluster 7.6</a>. For
    similar information about NDB Cluster 7.5, see
    <a class="ulink" href="https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-what-is-new-7-5.html" target="_top">What is New in NDB Cluster 7.5</a>. For
    information about previous NDB Cluster releases, see
    <a class="ulink" href="https://dev.mysql.com/doc/refman/5.6/en/mysql-cluster.html" target="_top">MySQL NDB Cluster 7.3 and NDB Cluster 7.4</a>, and
    <a class="ulink" href="https://dev.mysql.com/doc/refman/5.5/en/mysql-cluster.html" target="_top">MySQL NDB Cluster 7.2</a>.
  </p><p>
    The contents of this chapter are subject to revision as NDB Cluster
    continues to evolve. Additional information regarding NDB Cluster
    can be found on the MySQL website at
    <a class="ulink" href="http://www.mysql.com/products/cluster/" target="_top">http://www.mysql.com/products/cluster/</a>.
  </p><a class="indexterm" name="idm139663115295296"></a><p><b>Additional Resources. </b>
      More information about NDB Cluster can be found in the following
      places:
</p>
<div class="itemizedlist">
<ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
        For answers to some commonly asked questions about NDB Cluster,
        see <a class="xref" href="faqs-mysql-cluster.html" title="A.10 MySQL 8.0 FAQ: NDB Cluster">Section A.10, “MySQL 8.0 FAQ: NDB Cluster”</a>.
      </p></li><li class="listitem"><p>
        The NDB Cluster Forum: <a class="ulink" href="https://forums.mysql.com/list.php?25" target="_top">https://forums.mysql.com/list.php?25</a>.
      </p></li><li class="listitem"><p>
        Many NDB Cluster users and developers blog about their
        experiences with NDB Cluster, and make feeds of these available
        through
        <a class="ulink" href="http://www.planetmysql.org/" target="_top">PlanetMySQL</a>.
</p></li></ul>
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